5©* INDEX. 



Nitntgfn. Singular disappearance, and 



formation of, by potassium and 



ammonia, 173 ; Davy's opinion of, 



173 



ffltraut compound. Opinion on, 173 



Or? on floating bodies, 249,476 



Optica!, instruments, 290, 337, 383 



an, native, found in Brazilian 



piatina, 250 



Patents, ' 93.174,253,414,502 

 Pearson on expectorated matter, 4! ! 5 

 Ptudulum roils On, 30 



Peppermint. On distiiliiij, 167 



Pcpys on respiration, 406 



Pe.tTifac!v>v. A curious, 501 



Phosphoiic add found in iron ores, 14 

 ph ■«■ horic ttlm: On, 302 



Ph mpliorus. Davy on, 479 



PiftvhT of Paris cash. To harden, 



409 ; on burning, 433 



, contains native 



palladium, 250 



Poor, interesting details respecting 



the, 221 



Patftih fused with iron, 160 



Potassium. Exper. on, with ammonia, 



173; action of, on ammonia, 480 

 Pressure of atmosphere, 4 i 7 



Proportion. On, 426 



Prmist on prussiates, 42 



Pr iterates. On, 42 



Pygmies. Race of, 333 



Radicles produced from bark, n;>t 



from alburnum, 174 



Refrangibility of light. On, 337 



Respiration, on, 496 



Richardson's, R., method of raising 



large stones out of the earth, 214 

 Richardson, W,, on basaltic rocks, 



102, 194; observation* on, 257 

 Rrtcks. On struc ure of, 102,194 



Royal Society, 83, 173, 250, 332, 408, 



493 

 SatfrHngtons method of preserving 



fruit, 208 



Screw-wrench. Improved, 450 



Sea snake, 90,251,411 



Secretions, animal. Agency of electri- 

 city on, 488 

 Silk; carbonised, 4 

 Societies. Learned, S8, 173,250,332,408 



493 

 Society of Antiquaries , 333 



Society of Arts, Sec. 409 



Speer on atmospheric density and 



pressure, 417 



Stanhope (Earl), Farey 's reply to, 292 

 Steal i:es, analysis of, 136 



Stones. Machine for raising out of 



the earth, 21 4 



Stonyhurst establishment, 412 



Strontian fused with iron, 160 



Sub terraneous heat. On, 320 



Sugar. Charcoal of, 3 



Sulphur. Davy on, 479 



S'llohurct, a triple, 408 



Sun fish, 92 



Surgical cases, 490 



contrivance for preventing 

 doors from dragging, 448 



Taunton on hydrophobia, 24; Dispen- 

 sary report, 490 

 Tar. Analysis of, 136 

 Taylor (the Platonist), discoveries in 

 mathematics, 92 

 Telegraph. Lehardy's, 843 

 Telescopes. Proposed improvements 

 of, 290, 337 

 Test a ecu, Sro!ti<h, 252 

 Thames archway. On the, 372 

 Thermometer. Proposal to alter scale 

 of, 166 

 Timber, Growing. On value of, 327, 



350 

 Time-keepers. On pendulums of, 30; 

 on finding the rates of, 402 



Toad found at the depth of 57 fa-* 

 thorns in the earth, 251 



Trees, fruit. On training, 35 



Troug.htou's dividing instrument, 90, 



173 

 Valley s.On formation of, 385,442, 452 

 Vauquclin on steatites, 136 



Vauxfutlins analysis of iron and 

 scoriae, 12 



Vegetable substances. On carbonising, 

 3,49, 116 

 Vines. On culture of, 32 



Vineyards <J Champagne. On, 77, 142, 



227 



Waistell on value of growing timber, 



327, 350 



Water. Ponderable matter of, 173 



Walker, Ezra, on pendulum rods, SO 



Walker's scale for thermometer, 166 



We-rnerian Society, 90, 251, 409 



Whale caught in the Thames, 334 



Williams on culture of grapes, 32 



Wine, Champagne. On, 77, 142, 222 



Wollaslon on Brazilian piatina, 250 ; 



on agency of electricity on animal 



secretions, 488; on columbiumand 



tantalium,494 ;on goniometer, 4?5 



Wool, caibonibed, 4; Merino, 241, 



287 

 Wrench. Barlow's improved, 450 



Yoia^s hydraulic investigations, 123, 



182; tables of elective attraction, 



173 



END OF THE THIRTY-THIRD VOLUME. 



Printed by Richard Taylor and Co., Snoe Lane, Loudon. 



